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Finding the Fourth Proportional to 125,999.68, 188,998.96 and 86,436.64

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Solution

The fourth proportional to 125,999.68, 188,998.96 and 86,436.64 is: 129,654.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,999.68 : 188,998.96 = 86,436.64 : x
  2. Step 2: Convert to fraction form
    125,999.68/188,998.96 = 86,436.64/x
  3. Step 3: Cross multiply
    125,999.68x = 188,998.96 × 86,436.64
  4. Step 4: Simplify right side
    125,999.68x = 16,336,435,065.89
  5. Step 5: Solve for x
    x = 16,336,435,065.89/125,999.68
  6. Step 6: Final answer
    x = 129,654.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.